42352609 has 8 divisors (see below), whose sum is σ = 45700200. Its totient is φ = 39017856.

The previous prime is 42352571. The next prime is 42352613. The reversal of 42352609 is 90625324.

It can be written as a sum of positive squares in 4 ways, for example, as 685584 + 41667025 = 828^2 + 6455^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42352609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42352669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4317 + ... + 10165.

It is an arithmetic number, because the mean of its divisors is an integer number (5712525).

Almost surely, 2^42352609 is an apocalyptic number.

It is an amenable number.

42352609 is a deficient number, since it is larger than the sum of its proper divisors (3347591).

42352609 is a wasteful number, since it uses less digits than its factorization.

42352609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6419.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 42352609 is about 6507.8882135452. Note that the first 3 decimals coincide. The cubic root of 42352609 is about 348.5727153991.

The spelling of 42352609 in words is "forty-two million, three hundred fifty-two thousand, six hundred nine".